More on HERF

HERF is more common than you may realize. If you have a recent US
dime or quarter, you will notice that it is a 3 layer sandwich. HERF
is used to bond the disimilar layers together.

Closer to a boating topic, HERF is used to make the aluminum-steel
transition bonding strips, so you can weld the steel side to the hull
or deck and weld aluminum from there on up.

Dick